P3062moderate severityPowertrain
Shift Quality - Harsh Downshift Detected
on 2003 Mazda B2300 2.3L I4 · FWD
What this code means
The TCM detected excessively harsh downshifts. The transition between gears during deceleration is abrupt.
Symptoms
- Check Engine Light
- Harsh downshifts
- Vehicle lurches on deceleration
- Engine braking feels excessive
- Driveline shudder on downshift
- Abrupt speed change during coast-down
Common causes
- Faulty shift timing solenoid
- Torque converter clutch not releasing
- Pressure control solenoid malfunction
- Valve body wear
- Incorrect TCM calibration
Diagnostic steps
- Monitor shift quality PIDs during deceleration
- Check TCC release timing
- Test pressure control solenoid
- Inspect shift solenoid operation
- Review TCM software version
Repair notes
Replace pressure control solenoid or valve body. TCM reflash may be available from manufacturer.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1